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Filter: Fix crash with 'where' filters and function calls

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The old 'where' code computed size value incorrectly, which leads
to invalid instruction lines and filter errors or crashes.
This commit is contained in:
Ondrej Zajicek (work) 2019-09-10 13:45:18 +02:00
parent 1127887a8b
commit 452e90ba72
1 changed files with 4 additions and 25 deletions
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29
filter/f-util.c
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@ -32,33 +32,12 @@ filter_name(const struct filter *filter)
struct filter *f_new_where(struct f_inst *where)
{
struct f_inst acc = {
.fi_code = FI_DIE,
.lineno = ifs->lino,
.size = 1,
.i_FI_DIE = { .fret = F_ACCEPT, },
};
struct f_inst rej = {
.fi_code = FI_DIE,
.lineno = ifs->lino,
.size = 1,
.i_FI_DIE = { .fret = F_REJECT, },
};
struct f_inst i = {
.fi_code = FI_CONDITION,
.lineno = ifs->lino,
.size = 3 + where->size,
.i_FI_CONDITION = {
.f1 = where,
.f2 = &acc,
.f3 = &rej,
},
};
struct f_inst *cond = f_new_inst(FI_CONDITION, where,
f_new_inst(FI_DIE, F_ACCEPT),
f_new_inst(FI_DIE, F_REJECT));
struct filter *f = cfg_allocz(sizeof(struct filter));
f->root = f_linearize(&i);
f->root = f_linearize(cond);
return f;
}